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G. SCHWABE. SHUTTLE THROWING DEVIGB FOR LOOMS. No. 540,878. Patented June 11, 1895.

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G. SGHWABE. SHUTTLB THROWING DEVICE FOR LOOMS.

No. 540,878. Patented Juhe 11, 1895.

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UNITED STATES PATE T @rrrcs.

-GEORG SGHWABE, OF BIALA, AUSTRIA-HUNGARY.

SHLUTTLE-THROWING DEVICE FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 540,878, dated June 11, 1895.

Application filed Novemher 30,1894. Serial 110.530,!512- (r0 model.)

To all whom it may concern.-

Be it known that 1-, GEORG SCHWABE, a subject of the Emperor of Austria-Hungary, re

siding at Biala, in the Empire of Austria- Hungary, have invented new and useful Improvements in Shuttle-Throwing Devices for Looms, of which the following is a specification.

In the various looms now in use, with the exception of the so-called spring-loom, the shuttle (whether under or over) is thrown by thejwell-known mechanism wherein the eccentric or cam-projection, mounted on the lay shaft or on a separate shaft, actuates a pin with a roller and spindle appertaining thereto, and consequently drives forward the throwsector secured to it, as well as (by means of a pawl 01' clink) the loosely mounted throwlever, and thereby the picker-shaft, thus setting the shuttle in motion. The return of the roller and spindle together with the sector is effected by the tapering form of the cam- For this purpose a tension-spring presses the roller firmly to the latter. In order that the throw-lever (mounted loosely on the throw-shaft) and the pickershaft may also be similarly actuated by the said tapering cam-projection, a second ten- 'sion spring, secured to the throw-lever presses the lever closely to the sector. The power, exerted by the springs, must be in exact proportion tothe speed or number ofrevolutions of the loom. The throw-lever and pickershaft, with the. picker, move freely on the band springs, upon the picker-guide, which springs by their compression and contraction, in combination with the other springs of the whole apparatus, must be adapted to create such a resistance as to take up or absorb the force developed by the throw. These springdevices do not last long. The resistance of the springs is constantly diminishing, while the force of the throw increases in the same proportion. The consequent derangements, and the excessive wear developed in all the parts, as well as the great and constantly increasing consumption of power, diminish the efliciency of the loom, especially at high speeds. V

The new shuttle-throwing device, which is the subject of this invention completely obviates these defects. In lieu of the eccentric or cam-projection with the necessary tension springs, by means of which a positive motion in one direction only is obtainable, is substituted a revolving crank, which by means of the mechanism appertaining thereto is in constant connection with the throw-sector, so that all the movements thus-generated in the sector, viz., a rapid outward swing for the stroke, a slow return on the completion of the stroke, and a long period of complete rest, during which the rise and fall of the pawl or clink are provided for, are rendered com-- pulsory and unalterable.

In the accompanying drawings, Figurel is a side elevation of the arrangement of parts constituting my invention. Fig. 2 is a front elevation thereof. Figs. 3, 4,.5, and 6 illustrate the various principal positions of the same. Fig. 7 is a detail View of the safetyjoint.

The crank d is connected by its crank-pin e and link f with the pivot-pin g, which latter is at the same time the connecting pivot-pin of the bent lever h and the connecting-rod h, so that all circles struck from the point of suspension of the bent lever h as a center, and from the end of the connecting rod h as a center, respectively, must pass through the center of the connecting pivot 9 (Fig. 5). At

the outer end of the connecting rod h is located a pin it through which it actuates the throw-sector Z, which is secured on the throwshaft 0, whereon is also loosely mounted the throw-lever 10, which has secured to it by the pivot-pin g the pawl or clink 1', which is actuated from the lay actuated lever r. The clink 7', when dropped, encounters the nose or projection cast on the sector Z, and the driver or projecting tooth Z' (also cast on the sector) engages laterally (Fig. 4) with the corresponding tooth 19' cast on the throw-lever 19, so that the latter and the sector Z are firmly engaged together, on the one hand by the two teeth Z' 1) and on the other hand by the clink or pawl 0", when let fall in front of the nose or projection of the sector Z.

The pin 19 of the throw-leverp is connected with the throw-arm or picker-shaft t, by a wooden tension-bar 5 having its end affixed to the latter to be movable vertically; The throw-arm or picker-shaft tcan turn on a pin it and its upperend is secured to the leather picker 1). The tension-bar is fitted with a usual safety-joint or hinge, the construction of which is shown on an enlarged scale in Fig. 7. t l ,i From the pin m on the throw-sector a tension-bar 'n. is carried to the left side of the loom. W a.

The action of the crank (1 during one revolution, upon the point of the throw-sector Zis as follows: The crank 01 rotating in: the direction indicated by the arrow (Fig.2, commencing position, and Fig. 5) communicates its movement first of all by the linkf to the linking center g and there developsiia reoiprocating or toand fro-motion.; As,,in order to effect the throw, a forward movementor thrust of the point g duringa very small portion of a revolution ofthe crank d, t'. a, from c to 6 in the diagram Fig.5, is requireduthe link f is made somewhat longer than .the crank-radius, on the one hand, while outhe other, the position of the point of suspension 2' and thelength of the bent lever h are so arranged that the forward movement of the same at the point 9 is opposed to that of the retation of the crankdand therefore the crankpoint (or dead-point) at the extreme outward limit of the swing, approaches nearer. to the commencing pointof thercoiprocating motion. The quick swing outward of the connecting joint g further generates a co-operative working of the bent lever h and connecting rod h, which causes an upward swing of the point 7c of the throw-sector l and thereby produces the requisite throw-movement or action in thelatter. This action is transmitted from the sector Z by the clink or pawl r,-throw leverp and wood-tension bar 5, to the throw-armor pickershaft 25 and picker 1), by which the shuttle is thrown. After the crank 61 and link fhave brought the connecting point g to its highest position (Fig. 3), the crank, d, as the rotation proceeds, commences a retrograde movement, while still advancing circumferentially; and consequently, after a brief period of rest, the inward swing of the bent lever h and connecting point g commences, the direction of the movement being contrary to that, which has just terminated, and therefore now coincident.

with that of the crank-rotation. Thereupon follows a gradually diminishing backward movement (in'a circular are as shown in Fig. 5) of the point g during the return stroke,

which is prolonged while, the crank traverses the major part of the periphery of its circle of rotation; and simultaneously the return swing of the bent lever hinco njunction with.

the connecting rod h proceeds, whereby through the joint 7c, the throw-sector Z, lever 19 and tension-bar s, the throw-arm or pickershaft t and picker 1; are slowly returned to their normal position, preparatory to the next shot or pick, as shown in Fig. 6. Although, during the latter portion of this revolution of the crank 61, the connecting point 9 of the bent lever h and connecting rod h undergo a corresponding inward oscillation, while the crank itself passes the lowest point of its movement and continues its upward course, this has no efiect upon the position of the point of connection is with the sector 1 because the points 9 and k as well as the sector I and-the throw-leverp become stationary in the position shown in Fig. 6 during the inward bending of the joint 9 and so remain until thecrank pin c once more arrives at the commencing point e of the next throw (Figs. 2 and 5), when the outward swing and sudden displacement (causing the pick or shot) recur.

During the period of immobility of the throwsector I, the. pawl or clink 0; may be raised or lowered at ,pleasure. flhethrow-lever. rests against theskewback or abutment .y,lwhile the teeth Z. and 19 remain incontact,

and a certain amount ofrplayis given to the pawl or clinkn", to allow, of its rise and fall. When the pawl is lifted, the throw-lever 1.1 is

.left undisturbed, resting against y, unaffected .by the outward swing of the feed sector I which through pivot 'mand the tension-bar n,

thenoperatesthe throw-lever of the left side i of theloom forthe ,returnpick or shot, to throw theshuttlehack again. .Tlhe, rotating crank dis firmly mounted. onashaft c, to which is keyed the bevel-wheel b driven by the bevelwheel I) cast on the main driving wheel of the powerloom. 1 H H .Having nowparticularly described and as certained thenature of the said invention and in what manner the same is to be performed,

.I declare that what I claim is- .1. Ashuttlethrowing device for powerlooms comprising arotaryshaft, a crank mounted .thereon,,a vibrating lever h provided with a pivot-pin g, a link f coupled to the crank and pivot-pin, athrow-sector Zconnected with the pivot-pin .g, a throw-lever p, a separable coupling unitiug said lever and the throw-sector,

.a picker-arm t, and aconnection between the same, andthe throw-lever,substantially as described. .i j j 2. Ashuttle throwing devicefor powerlooms comprising a rotary shaft, a crank mounted thereon, a vibrating lever It provided with a pivot-pin g, a linkf coupled to the crank and pivot-pin, a throw-sector Z connected with the pivot-pin g, a throw-lever 9 provided with a pawl engaging the throw-sector, a lever a" connected with said pawl and actuated by the lay, a picker-arm t, and a connection between the same and the, throw-lever, substantially as described.

3. .A shuttle throwingdevice for power looms comprising a rotary shaft 0, a crank mounted thereon, a. lever it having its free end provided with a pivot-pin, a link f connecting said pin with the crank pin, a throw-sector l, a rod h connecting the latter with the pivotping, a throw-lever p in engagement with the throw-sector and provided with a pawl r engaging the throw-sector, a lever r actuated by the lay and connected with said pawl, a

picker-arm t, and a tension-bar 8 connecting the throw-lever with the picker-arm, substantially as described.

4. A shuttle throwing device for power looms consisting of a rotary shaft 0, a crank d with a crank-pin e, a curved vibrating lever h mounted on aseparate stud 'i and provided at its outer end with a pivot-pin g, a link f engaged at its endsby the crank-pin e'and pin 9, a shaft 0, a fixed throw-sector Zon said shaft provided with pivot-pins k and m, a rod h connecting the pivot-pins g and k, a throwlever 10 loosely mounted on shaft 0 and pro- GEORG SCHWABE.

' Witnesses:

ANTON BUDZIKIEWICZ, KARL SCHMIDT. 

